java容器，遍历的同时删除元素

gistfile1.java

ArrayList<String> list = new ArrayList<String>();
list.add("a");
list.add("b");
list.add("c");
System.out.println(list.size());
// This will fail
// for (String item : list) {
// list.remove(item);
// }
Iterator<String> iter = list.iterator();
while (iter.hasNext()) {
	String a = iter.next();
	iter.remove();
	System.out.println("removed " + a);
}
System.out.println(list.size());